CVE-2026-70208: Windows HTTP.sys out-of-bounds read information disclosure

CVE-2026-70208 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Windows HTTP.sys, a core Windows component that processes HTTP network traffic, contains an out-of-bounds read vulnerability that allows an authorized local attacker to read sensitive data from system memory. An attacker with local access could potentially obtain confidential information such as credentials or other sensitive details that the HTTP service has processed.

Technologies: Microsoft Windows HTTP.sys. Vendors: Microsoft.

Quick answers

Is CVE-2026-70208 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-70208 being exploited in the wild.
How severe is CVE-2026-70208?
Medium severity, with a CVSS score of 5.5, published 13 October 2026.
Which products and versions are affected?
Microsoft Windows HTTP.sys.
Is there a fix for CVE-2026-70208?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-70208 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-70208?
Check whether you run Microsoft Windows HTTP.sys. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read in HTTP.sys allows an authenticated local attacker to access memory beyond intended boundaries. The vulnerability requires local access and prior authentication to the system. The attacker can disclose arbitrary information from memory locations accessible to the HTTP service process.

Affected products

  • Microsoft Windows HTTP.sys

Timeline

  • 2026-10-13: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.